score = 80
if score >= 90:
    print("优秀")
elif score >= 80:
    print("良好")
elif score >= 60:
    print("及格")
else:
    print("不及格")

username = "13312345678"
password = "123456"
verifycode = "6666"

user_name = input("手机号")
pass_word = input("密码")
verify_code = input("验证码")

if user_name == username and pass_word == password and verify_code == verifycode:
    print("登录成功")
elif user_name != username and pass_word == password and verify_code == verifycode:
    print("账号不存在")
elif user_name == username and pass_word != password and verify_code == verifycode:
    print("密码错误")
elif user_name == username and pass_word == password and verify_code != verifycode:
    print("验证码错误")
else:
    print("登录失败")